22021122320 has 20 divisors (see below), whose sum is σ = 51199109580. Its totient is φ = 8808448896.

The previous prime is 22021122313. The next prime is 22021122337. The reversal of 22021122320 is 2322112022.

It can be written as a sum of positive squares in 2 ways, for example, as 15616001296 + 6405121024 = 124964^2 + 80032^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137631935 + ... + 137632094.

It is an arithmetic number, because the mean of its divisors is an integer number (2559955479).

Almost surely, 2^22021122320 is an apocalyptic number.

22021122320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021122320 is an abundant number, since it is smaller than the sum of its proper divisors (29177987260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021122320 is a wasteful number, since it uses less digits than its factorization.

22021122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275264042 (or 275264036 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22021122320 its reverse (2322112022), we get a palindrome (24343234342).

The spelling of 22021122320 in words is "twenty-two billion, twenty-one million, one hundred twenty-two thousand, three hundred twenty".